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Foundation Engineering P9.10. Plot a curve showing the distribution of excess porewater pressure in the clay...
6.19 Plot the distribution of total stress, effective stress, and porewater pressure with depth for the...
6.19 Plot the distribution of total stress, effective stress, and porewater pressure with depth for the soil profile shown in Figure P6.19. Neglect capillary action and pore air pressure. sand30. GWL 5 ft w= 28% Figure P6.19
geotechnical engineering The soil profile at a site consists of a clay layer 10 m thick,...
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
6. The flow curve equation for a material is given as follow. Plot the engineering stress-strain...
6. The flow curve equation for a material is given as follow. Plot the engineering stress-strain curve for the material. Label the plot properly. 0 = 552.7 €0.2 MPa [Hint: Transform the flow curve equation to engineering stress-strain equation]
The results of a laboratory consolidation test on a clay specimen are given in the table...
The results of a laboratory consolidation test on a clay
specimen are given in the table
The initial height of the specimen is H=19 mm, specific gravity
is ?? = 2.68, moisture content is ? = 26%.
a. Draw the ? − log ?? ′ (?? ? − log ? ) curve (the student is
allowed to plot using spreadsheet)
b. Determine the preconsolidation stress
Question 1 (40 points): The results of a laboratory consolidation test on a clay specimen...
A CU triaxial test was carried out on a silty clay that was isotropically consolidated using a cell pressure of 125 kPa. The following data were obtained: Axial load Axial strain, s, (6) (kPa) Au...
A CU triaxial test was carried out on a silty clay that was isotropically consolidated using a cell pressure of 125 kPa. The following data were obtained: Axial load Axial strain, s, (6) (kPa) Au (kPa) 5.5 11.0 24.5 28.5 35.0 50.5 85.0 105.0 120.8 0.05 0.12 0.29 0.38 0.56 1.08 2.43 4.02 9.15 4.0 8.6 19.1 29.3 34.8 41.0 49.7 55.8 9.0 (a) Plot the deviatoric stress against axial strain and excess porewater pressure against axial strain. (b) Determine...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 1...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
2. A consolidation test was made on a sample of saturated clay in a circular ring with a height o...
2. A consolidation test was made on a sample of saturated clay in a circular ring with a height of 1.22 inches and an area of 4.91 square inches. Primary consolidation under the addition of each load was essentially complete at the end of 24 hours. The dial readings corresponding to the end of primary consolidation under each load increment are provided below. The initial void ratio was 1.70 Dial Reading (inch x 10 Pressure (tsf) 0.000 0.064 0.131 0.264...
(5 pts) 1. Please answer the following either true (T) or false (F) TRUE OR FALSE All else being equal, water will flow faster through a soil layer with a low coefficient of A sample of soil with a c...
(5 pts) 1. Please answer the following either true (T) or false (F) TRUE OR FALSE All else being equal, water will flow faster through a soil layer with a low coefficient of A sample of soil with a coefficient of uniformity equal to 6.3 and coefficient of curvature permeability than through a layer with a high coefficient. equal to 2.4 must be classified as a well graded sand. The compression index, C represents the slope of the virgin consolidation...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown in Figure 2. The water table is at the interface of the soil layers. (8 marks) Soil 1: c'0 kPa, ' 32 y 16 kN/m 2 m 4 m Soil 2: c'-5 kPa, 30° Yet20 kN/m3 Figure 2 (b) In Figure 3 below, the L-shaped area carries a 200 kN/m2 uniform load. Determine the vertical stress increase due to the loading at a depth...
6.19 Plot the distribution of total stress, effective stress, and porewater pressure with depth for the soil profile shown in Figure P6.19. Neglect capillary action and pore air pressure. sand30. GWL 5 ft w= 28% Figure P6.19
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
6. The flow curve equation for a material is given as follow. Plot the engineering stress-strain curve for the material. Label the plot properly. 0 = 552.7 €0.2 MPa [Hint: Transform the flow curve equation to engineering stress-strain equation]
The results of a laboratory consolidation test on a clay
specimen are given in the table
The initial height of the specimen is H=19 mm, specific gravity
is ?? = 2.68, moisture content is ? = 26%.
a. Draw the ? − log ?? ′ (?? ? − log ? ) curve (the student is
allowed to plot using spreadsheet)
b. Determine the preconsolidation stress
Question 1 (40 points): The results of a laboratory consolidation test on a clay specimen...
A CU triaxial test was carried out on a silty clay that was isotropically consolidated using a cell pressure of 125 kPa. The following data were obtained: Axial load Axial strain, s, (6) (kPa) Au (kPa) 5.5 11.0 24.5 28.5 35.0 50.5 85.0 105.0 120.8 0.05 0.12 0.29 0.38 0.56 1.08 2.43 4.02 9.15 4.0 8.6 19.1 29.3 34.8 41.0 49.7 55.8 9.0 (a) Plot the deviatoric stress against axial strain and excess porewater pressure against axial strain. (b) Determine...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
2. A consolidation test was made on a sample of saturated clay in a circular ring with a height of 1.22 inches and an area of 4.91 square inches. Primary consolidation under the addition of each load was essentially complete at the end of 24 hours. The dial readings corresponding to the end of primary consolidation under each load increment are provided below. The initial void ratio was 1.70 Dial Reading (inch x 10 Pressure (tsf) 0.000 0.064 0.131 0.264...
(5 pts) 1. Please answer the following either true (T) or false (F) TRUE OR FALSE All else being equal, water will flow faster through a soil layer with a low coefficient of A sample of soil with a coefficient of uniformity equal to 6.3 and coefficient of curvature permeability than through a layer with a high coefficient. equal to 2.4 must be classified as a well graded sand. The compression index, C represents the slope of the virgin consolidation...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown in Figure 2. The water table is at the interface of the soil layers. (8 marks) Soil 1: c'0 kPa, ' 32 y 16 kN/m 2 m 4 m Soil 2: c'-5 kPa, 30° Yet20 kN/m3 Figure 2 (b) In Figure 3 below, the L-shaped area carries a 200 kN/m2 uniform load. Determine the vertical stress increase due to the loading at a depth...
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